Circadian rhythms regulate amelogenesis.
Circadian rhythms regulate amelogenesis.
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DOI:
10.1016/j.bone.2013.02.011
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发表时间:
2013-07
期刊:
影响因子:
4.1
通讯作者:
Papagerakis, Petros
中科院分区:
文献类型:
--
作者:
Zheng, Li;Seon, Yoon Ji;Mourao, Marcio A.;Schnell, Santiago;Kim, Doohak;Harada, Hidemitsu;Papagerakis, Silvana;Papagerakis, Petros
Ameloblasts, the cells responsible for making enamel, modify their morphological features in response to specialized functions necessary for synchronized ameloblast differentiation and enamel formation. Secretory and maturation ameloblasts are characterized by the expression of stage-specific genes which follows strictly controlled repetitive patterns. Circadian rhythms are recognized as key regulators of development and diseases of many tissues including bone. Our aim was to gain novel insights on the role of clock genes in enamel formation and to explore the potential links between circadian rhythms and amelogenesis. Our data shows definitive evidence that the main clock genes (Bmal1, Clock, Per1 and Per2) oscillate in ameloblasts at regular circadian (24h) intervals both at RNA and protein levels. This study also reveals that two markers of ameloblast differentiation i.e. amelogenin (Amelx; a marker of secretory ameloblasts) and kallikrein-related peptidase 4 (Klk4, a marker of maturation ameloblasts) are downstream targets of clock genes. Both, Amelx and Klk4 show 24h oscillatory expression patterns and their expression levels are up-regulated after Bmal1 over-expression in HAT-7 ameloblast cells. Taken together, these data suggest that both the secretory and the maturation stage of amelogenesis might be under circadian control. Changes in clock genes expression patterns might result in significant alterations of enamel apposition and mineralization.
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影响因子:
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DOI:
10.1073/pnas.0503108102
发表时间:
2005-10-04
影响因子:
11.1
作者:
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通讯作者:
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